<template>
    <el-card class="page-container">
        <template #header>
            <div class="header">
                <span>文章管理</span>
                <div class="extra">
                    <el-button type="primary" @click="visibleDrawer=true;title='添加文章'">添加文章</el-button>
                </div>
            </div>
        </template>
        <!-- 搜索表单 -->
        <el-form inline>
            <el-form-item label="文章分类：">
                <el-select placeholder="请选择" v-model="categoryId">
                    <el-option
                            v-for="c in categoryList"
                            :key="c.id"
                            :label="c.categoryName"
                            :value="c.id">
                    </el-option>
                </el-select>
            </el-form-item>

            <el-form-item label="发布状态：">
                <el-select placeholder="请选择" v-model="state">
                    <el-option label="已发布" value="已发布"></el-option>
                    <el-option label="草稿" value="草稿"></el-option>
                </el-select>
            </el-form-item>
            <el-form-item>
                <el-button type="primary" @click="list()">搜索</el-button>
                <el-button @click="categoryId='';state='';list()">重置</el-button>
            </el-form-item>
        </el-form>

        <!-- 文章列表 -->
        <el-table :data="articleList" style="width: 100%">
            <el-table-column label="文章标题" width="400" prop="title"></el-table-column>
            <el-table-column label="分类" prop="categoryName"></el-table-column>
            <el-table-column label="发表时间" prop="createTime"></el-table-column>
            <el-table-column label="状态" prop="state"></el-table-column>
            <el-table-column label="操作" width="100">
                <template #default="{ row }">
                    <el-button :icon="Edit" circle plain type="primary"
                               @click="showVisibleDrawer(row)"></el-button>
                    <el-button :icon="Delete" circle plain type="danger"
                               @click="deleteArticle(row)"></el-button>
                </template>
            </el-table-column>
            <template #empty>
                <el-empty description="没有数据"/>
            </template>
        </el-table>

        <!-- 分页条 -->
        <el-pagination v-model:current-page="pageNum" v-model:page-size="pageSize" :page-sizes="[3, 5 ,10, 15]"
                       layout="jumper, total, sizes, prev, pager, next" background :total="total"
                       @size-change="onSizeChange"
                       @current-change="onCurrentChange" style="margin-top: 20px; justify-content: flex-end"/>

        <!-- 抽屉 -->
        <el-drawer v-model="visibleDrawer" :title="title" direction="rtl" size="50%">
            <!-- 添加文章表单 -->
            <el-form :model="articleModel" label-width="100px">
                <el-form-item label="文章标题">
                    <el-input v-model="articleModel.title" placeholder="请输入标题"></el-input>
                </el-form-item>
                <el-form-item label="文章分类">
                    <el-select placeholder="请选择" v-model="articleModel.categoryId">
                        <el-option v-for="c in categoryList" :key="c.id" :label="c.categoryName" :value="c.id">
                        </el-option>
                    </el-select>
                </el-form-item>
                <el-form-item label="文章封面">
                    <!--
                        auto-upload: 设置是否自动上传
                        action: 设置服务器接口路径
                        name: 设置上传的文件字段名
                        headers: 设置上传的请求头
                        on-success: 设置上传成功的回调函数
                    -->
                    <el-upload class="avatar-uploader" :auto-upload="true" :show-file-list="false"
                               action="/api/upload" name="file" :headers="{'Authorization': tokenStore.token}"
                               :on-success="uploadSuccess"
                    >
                        <img v-if="articleModel.coverImg" :src="articleModel.coverImg" class="avatar"/>
                        <el-icon v-else class="avatar-uploader-icon">
                            <Plus/>
                        </el-icon>
                    </el-upload>
                </el-form-item>
                <el-form-item label="文章内容">
                    <div class="editor">
                        <quill-editor
                                theme="snow"
                                v-model:content="articleModel.content"
                                contentType="html"
                        >
                        </quill-editor>
                    </div>
                </el-form-item>
                <el-form-item>
                    <el-button type="primary" @click="title==='添加文章'?addArticle('已发布'):updateArticle()">发布
                    </el-button>
                    <el-button type="info" @click="title==='添加文章'?addArticle('草稿'):updateArticle()">草稿
                    </el-button>
                </el-form-item>
            </el-form>
        </el-drawer>
    </el-card>
</template>

<script setup>
    import {
        Edit,
        Delete
    } from '@element-plus/icons-vue'

    import {ref} from 'vue'
    import {
        articleCategoryService,
        articleListService,
        articleAddService,
        articleDetailService,
        articleUpdateService, articleDeleteService
    } from "@/api/article";

    // 导入token


    // 文章分类数据模型
    const categoryList = ref([
        {
            "id": 3,
            "categoryName": "美食",
            "categoryAlias": "my",
            "createTime": "2023-09-02 12:06:59",
            "updateTime": "2023-09-02 12:06:59"
        },
        {
            "id": 4,
            "categoryName": "娱乐",
            "categoryAlias": "yl",
            "createTime": "2023-09-02 12:08:16",
            "updateTime": "2023-09-02 12:08:16"
        },
        {
            "id": 5,
            "categoryName": "军事",
            "categoryAlias": "js",
            "createTime": "2023-09-02 12:08:33",
            "updateTime": "2023-09-02 12:08:33"
        }
    ])

    // 用户搜索时选中的分类id
    const categoryId = ref('')

    // 用户搜索时选中的发布状态
    const state = ref('')

    // 文章列表数据模型
    const articleList = ref([
        {
            "id": 5,
            "title": "陕西旅游攻略",
            "content": "兵马俑,华清池,法门寺,华山...爱去哪去哪...",
            "coverImg": "https://big-event-gwd.oss-cn-beijing.aliyuncs.com/9bf1cf5b-1420-4c1b-91ad-e0f4631cbed4.png",
            "state": "草稿",
            "categoryId": 2,
            "createTime": "2023-09-03 11:55:30",
            "updateTime": "2023-09-03 11:55:30"
        },
        {
            "id": 5,
            "title": "陕西旅游攻略",
            "content": "兵马俑,华清池,法门寺,华山...爱去哪去哪...",
            "coverImg": "https://big-event-gwd.oss-cn-beijing.aliyuncs.com/9bf1cf5b-1420-4c1b-91ad-e0f4631cbed4.png",
            "state": "草稿",
            "categoryId": 2,
            "createTime": "2023-09-03 11:55:30",
            "updateTime": "2023-09-03 11:55:30"
        },
        {
            "id": 5,
            "title": "陕西旅游攻略",
            "content": "兵马俑,华清池,法门寺,华山...爱去哪去哪...",
            "coverImg": "https://big-event-gwd.oss-cn-beijing.aliyuncs.com/9bf1cf5b-1420-4c1b-91ad-e0f4631cbed4.png",
            "state": "草稿",
            "categoryId": 2,
            "createTime": "2023-09-03 11:55:30",
            "updateTime": "2023-09-03 11:55:30"
        },
    ])

    // 分页条数据模型
    const pageNum = ref(1)//当前页
    const total = ref(20)//总条数
    const pageSize = ref(3)//每页条数

    // 当每页条数发生了变化，调用此函数
    const onSizeChange = (size) => {
        pageSize.value = size
        list()
    }
    // 当前页码发生变化，调用此函数
    const onCurrentChange = (num) => {
        pageNum.value = num
        list()
    }

    // 回显文章分类
    const articleCategoryList = async () => {
        let result = await articleCategoryService();
        categoryList.value = result.data;
    }

    // 获取文章列表数据
    const list = async () => {
        let params = {
            pageNum: pageNum.value,
            pageSize: pageSize.value,
            categoryId: categoryId.value ? categoryId.value : null,
            state: state.value ? state.value : null
        }
        let result = await articleListService(params);

        // 渲染视图
        total.value = result.data.total;
        articleList.value = result.data.item;

        // 处理数据，给数据模型扩展一个属性categoryName，分类名称
        const categoryMap = categoryList.value.reduce((map, category) => {
            map[category.id] = category.categoryName;
            return map;
        })
        for (let i = 0; i < articleList.value.length; i++) {
            let article = articleList.value[i];
            article.categoryName = categoryMap[article.categoryId];
        }
    }

    articleCategoryList()
    list();

    // 富文本编辑器
    import {QuillEditor} from '@vueup/vue-quill'
    import '@vueup/vue-quill/dist/vue-quill.snow.css'
    import {Plus} from '@element-plus/icons-vue'

    //控制抽屉是否显示
    const visibleDrawer = ref(false)
    //添加表单数据模型
    const articleModel = ref({
        title: '',
        categoryId: '',
        coverImg: '',
        content: '',
        state: ''
    })

    // 导入token
    import {useTokenStore} from "@/stores/token";

    const tokenStore = useTokenStore();

    // 上传成功的回调函数
    const uploadSuccess = (result) => {
        articleModel.value.coverImg = result.data;
        console.log(result.data);
    }

    // 添加文章
    import {ElMessage, ElMessageBox} from "element-plus";

    const addArticle = async (clickState) => {
        // 把发布状态赋值给数据模型
        articleModel.value.state = clickState;
        // 调用接口
        let result = await articleAddService(articleModel.value)
        ElMessage.success(result.message ? result.message : "添加成功");
        // 让抽屉消失
        visibleDrawer.value = false;
        // 刷新列表
        await list()

    }

    const title = ref('');
    const showVisibleDrawer = async (row) => {
        visibleDrawer.value = true;
        title.value = "更新文章";
        let result = await articleDetailService(row.id);
        let article = result.data;
        // 数据拷贝
        articleModel.value.title = article.title;
        articleModel.value.state = article.state;
        articleModel.value.coverImg = article.coverImg;
        articleModel.value.categoryId = article.categoryId;
        articleModel.value.content = article.content;
        // 扩展id属性，将来需要传递给后台
        articleModel.value.id = article.id;
    }

    const updateArticle = async () => {

        // 更新文章
        let result = await articleUpdateService(articleModel.value);

        ElMessage.success(result.message ? result.message : "修改成功");

        // 获取所有文章
        await list();

        // 隐藏痰喘
        visibleDrawer.value = false;
    }

    const deleteArticle = (row) => {
        // 提示用户  确认框
        ElMessageBox.confirm(
            '您确认要删除该文章吗？',
            '温馨提示', {
                confirmButtonText: '确认',
                cancelButtonText: '取消',
                type: 'warning',
            }
        ).then(async () => {
            await articleDeleteService(row.id);
            ElMessage({
                type: 'success',
                message: '删除成功',
            })
            // 刷新列表
            await list();
        }).catch(() => {
            ElMessage({
                type: 'info',
                message: '取消删除',
            })
        })
    }

</script>

<style lang="scss" scoped>
  .page-container {
    min-height: 100%;
    box-sizing: border-box;

    .header {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
  }

  /* 抽屉样式 */
  .avatar-uploader {
    :deep() {
      .avatar {
        width: 178px;
        height: 178px;
        display: block;
      }

      .el-upload {
        border: 1px dashed var(--el-border-color);
        border-radius: 6px;
        cursor: pointer;
        position: relative;
        overflow: hidden;
        transition: var(--el-transition-duration-fast);
      }

      .el-upload:hover {
        border-color: var(--el-color-primary);
      }

      .el-icon.avatar-uploader-icon {
        font-size: 28px;
        color: #8c939d;
        width: 178px;
        height: 178px;
        text-align: center;
      }
    }
  }

  .editor {
    width: 100%;

    :deep(.ql-editor) {
      min-height: 200px;
    }
  }
</style>
